I would definitely, very poorly named religion though as it turns people off immediately, at least LaVeyan Satanism. Not sure if anyone here actually knows anything about Satanism beyond the Satan part. It is basically an atheistic Ideology given the Satan label to tick off Christians. Some Satanists may very well be evil, but in the case of LaVey it's a very well thought out and intelligent way of life.
I agree with @FakeName123. A theist satanist is just plain evil, and though I don't believe in religion, I wouldn't want to be around someone who would sacrifice animals or even people and crap like that.
An atheist satanist is going to be one hell of a selfish person, and that's not my idea of a life partner.
I wouldn't want to be involved with someone who belongs in a cult or is very egotistical. We never know who we fall in love with, but when someone has completely different beliefs than you it's very difficult to have a meaningful relationship. I'm an othodox christian with a degree in theology. I 'm open to discussion but not willing to compromise or change my beliefs so long term relationship would be almost impossible
Isn't it the act of idolizing ones self? I'm not so keen on dating a person outside of my religion (I'm only 17 so my views might change later on) but I can't really bring said boyfriend home and having my parents find out he practices Satanism bc the name itself is a turn off haha